Just Cleaned Coils today. First time since buying refrigerator 5 yrs ago. Noticed strip between doors was hot on front of refrigerator after vacation ~10 days ago. There is NO Frost at back panel of freezer.

okay this tells me the compressor is overworking. what you need to do is remove the food in the freezer and then the back panel inside. (the rear wall) once thats off take a look at the frost pattern on the coils, are they evenly frost lightly ? or are some frosted but not all ?

can you get a thermometer to put inside the refrigerator section and get a reading ? we have covered the causes for this and the only thing left is the compressor constantly running to reach the set temp. if it runs all the time and the temp doesn't get to where its suppose to be the system overheats and causes the mullion to get how, the coils run through it to eliminate moisture on the gaskets and mullion.

okay thats the problem. for some reson the refrigerator is way high. this should be down around 38 degrees. thats why the compressor keeps running, its trying to get down to the correct temp but cant. this causes overheating, can you feel airflow from the freezer ? through the damper assembly ? (vent)

Wife Say's temp set high on Refrigerator. Turned it to normal setting. Can feel airflow from Damper Assembly. Mullion feels cooler. But, still warm. Frost is building up on Coils in Freezer heavier at Upper/Mid Portion 9/10.